Games like Grey Goo on Steam

For those who prefer not to search, lists of the most played, top deals and best free games like Grey Goo are available at the bottom of the page.

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Homeworld: Deserts of Kharak A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive.

Similarity 82%
Price -99% 0.88€
Rating 7.8
Release 20 Jan 2016
Supreme Commander 2 Includes 47 Steam achievements, leaderboards, and stats!

Similarity 82%
Price -76% 3.17€
Rating 8.6
Release 01 Mar 2010
Supreme Commander: Forged Alliance The last days of man are at hand.. Two years after the Infinite War the once great warring nations now lie in ruins, and humanity’s hope for a brighter future is nothing but a bitter memory. A new, seemingly unstoppable enemy, supported by the zealots of The Order, now seeks to eradicate mankind: UEF, Aeon Loyalist, and Cybran alike.

Similarity 81%
Price -69% 3.11€
Rating 9.4
Release 28 Sep 2011
Supreme Commander For a thousand years, three opposing forces have waged war for what they believe is true. There can be no room for compromise: their way is the only way. Dubbed The Infinite War, this devastating conflict has taken its toll on a once-peaceful galaxy and has only served to deepen the hatred between the factions.

Similarity 79%
Price -75% 2.50€
Rating 8.6
Release 28 Sep 2011
Halo Wars: Definitive Edition Halo Wars: Definitive Edition is an enhanced version of the real-time strategy classic, Halo Wars, updated to run natively on PC. Halo Wars: Definitive Edition includes improved graphics, new achievements and all of the DLC created for the landmark real-time strategy game.

Similarity 79%
Price 19.99€
Rating 8.8
Release 20 Apr 2017
Total Annihilation What began as a conflict over the transfer of consciousness from flesh to machines escalated into a war which has decimated a million worlds. The Core and the Arm have all but exhausted the resources of a galaxy in their struggle for domination.

Similarity 76%
Price 4.99€
Rating 9.3
Release 18 Dec 2015
Earth 2150 Trilogy Your heroes and your armies will need strong leadership to take them on a spellbinding odyssey that has everything a gamer’s heart could wish for breathtaking worlds in space, battles against cunning enemies and even downright treason from your own government faction - are you up to it?

Similarity 73%
Price -97% 0.38€
Rating 7.3
Release 01 Nov 2013
STAR WARS™ Empire at War - Gold Pack Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld?

Similarity 72%
Price 19.50€
Rating 9.6
Release 25 May 2010
Planetary Annihilation: TITANS Wage war across entire solar systems with massive armies at your command. Annihilate enemy forces with world-shattering TITAN-class units, and demolish planets with massive super weapons!

Similarity 71%
Price -76% 6.21€
Rating 8.3
Release 18 Aug 2015
Command & Conquer™ Remastered Collection Command & Conquer and Red Alert are both remastered in 4K by the former Westwood Studios team members. Includes all 3 expansions, rebuilt multiplayer, a modernized UI, Map Editor, bonus footage gallery, and over 7 hours of remastered music.

Similarity 70%
Price 19.99€
Rating 8.9
Release 05 Jun 2020
The Red Solstice 2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.

Similarity 69%
Price -90% 0.99€
Rating 6.9
Release 09 Jul 2015
Warhammer 40,000: Dawn of War - Anniversary Edition All of Warhammer 40,000: Dawn of War in one glorious package. Play the genre-defining classic real time strategy game in all its blood-soaked glory, including four complete campaigns and nine full-fledged factions.

Similarity 69%
Price 29.99€
Rating 9.2
Release 07 Aug 2007
Homeworld Remastered Collection Experience the epic space strategy games that redefined the RTS genre. Control your fleet and build an armada across more than 30 single-player missions. Choose unit types, fleet formations and flight tactics for each strategic situation.

Similarity 68%
Price -93% 2.25€
Rating 8.6
Release 25 Feb 2015
Earth 2140 The year is 2140. After numerous wars and several environmental disasters, only two world powers remain; the United Civilized States (»UCS«), covering the American continent, Western Europe and North Africa, and the Eurasian Dynasty (»ED«) covering the coherent landmasses of Eastern Europe and Asia.

Similarity 67%
Price -97% 0.21€
Rating 6.1
Release 15 Nov 2013
Iron Marines Real-time strategy battles in amazing sci-fi worlds! Command brave soldiers, mighty mechas and powerful aliens to face the greatest challenges in hostile alien worlds. The galaxy needs you!

Similarity 66%
Price -53% 5.99€
Rating 7.5
Release 15 May 2019
STAR WARS™ Galactic Battlegrounds Saga Lead the great armies of the Star Wars™ Episode II: Attack of the Clones saga in intense real-time strategy clashes. Enter the fray as the Galactic Empire, Rebel Alliance, Wookies, Trade Federation, Gungans or Royal Naboo to determine the course of the Galactic Civil War.

Similarity 66%
Price 5.89€
Rating 8.8
Release 01 Mar 2016
Original War An American geological expedition, under a UN mandate, assesses the natural resources in a distant part of Siberia, deep in the trackless steppes of Eastern Russia. But instead of oil, they discover a deposit of a hitherto unknown mineral.

Similarity 66%
Price -80% 1.99€
Rating 9.0
Release 27 Jan 2014
Age of Empires: Definitive Edition Age of Empires, the pivotal real-time strategy game that launched a 20-year legacy returns with modernized gameplay, all-new 4K visuals, 8-person multiplayer battles and a host of other new features. Welcome back to history.

Similarity 66%
Price -90% 2.18€
Rating 8.2
Release 19 Aug 2019
Act of Aggression - Reboot Edition Act of Aggression – Reboot Edition brings the techno-thriller RTS game Act of Aggression to a higher level. The Reboot Edition offers a full gameplay overhaul in skirmish mode against the AI and in your multiplayer battles.

Similarity 66%
Price 29.99€
Rating 6.5
Release 02 Sep 2015
Age of Empires IV: Anniversary Edition Celebrating its first year of delighting millions of global players, the award-winning and best-selling strategy franchise continues with Age of Empires IV: Anniversary Edition, putting you at the center of even more epic historical battles that shaped the world.

Similarity 65%
Price -67% 13.51€
Rating 8.5
Release 28 Oct 2021
Multiwinia Multiwinia is a fast-paced, retro-inspired RTS that blends arcade action with strategic depth. Command armies of Multiwinians in multiplayer battles across vibrant, nostalgic environments. With simple controls and dynamic gameplay, it offers endless fun and challenge for players of all skill levels.

Similarity 65%
Price 9.75€
Rating 7.7
Release 19 Sep 2008
Warhammer 40,000: Dawn of War II - Anniversary Edition All of Warhammer 40,000: Dawn of War II in one package. Play the award-winning real-time strategy game in all its glory, including three full campaigns, six multiplayer factions, and a full co-op Last Stand mode with eight unique heroes.

Similarity 65%
Price 44.99€
Rating 8.6
Release 18 Feb 2009
Company of Heroes: Tales of Valor Company of Heroes®: Tales of Valor™ is the expansion to the Game of the Year winner and highest rated real time strategy franchise Company of Heroes®. Featuring new campaigns to overcome, units to command, and battlefields to conquer, Company of Heroes®: Tales of Valor™ delivers evolved gameplay mechanics and 3 episodic adventures...

Similarity 65%
Price -80% 3.69€
Rating 8.9
Release 08 Apr 2009
Executive Assault Executive Assault is an indie real-time strategy/first-person shooter where you can not only build your base and create armies, but also take control of your units and fight as one of them.

Similarity 65%
Price 10.79€
Rating 8.1
Release 17 Jul 2015

Most played games like Grey Goo on Steam

Take a look at the top games like Grey Goo that are currently attracting the largest player bases on the Steam platform, as of June 16th 2025.

1. Age of Empires II: Definitive Edition

Similarity 62% 42 Civilizations, 229 Campaign Missions, Singleplayer, Co-Op, Multiplayer, In-Game Editor, Mods, Cross-play...It is good to be the king. Age of Empires II: Definitive Edition is a strategy, rts and city builder game developed by Forgotten Empires, Tantalus Media, Wicked Witch, World's Edge and CaptureAge and published by Xbox Game Studios. Released on November 14th 2019 has received 162,462 reviews of which 154,061 were positive and 8,401 were negative resulting in an impressive rating of 9.4 out of 10. The game has hit the top spot as the #1 most played game like Grey Goo, thanks to its 15,584 peak concurrent players over the last day.
9.4
154,061
8,401

15,584
players

2. Stellaris

Similarity 49% Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities. Stellaris is a space, grand strategy and strategy game developed by Paradox Development Studio and published by Paradox Interactive. Released on May 09th 2016 has received 185,433 reviews of which 159,527 were positive and 25,906 were negative resulting in a rating of 8.5 out of 10. While seeing 13,555 players online at once in the last 24 hours, this game is currently ranked #2 among games like Grey Goo based on player count.
8.5
159,527
25,906

13,555
players

3. Bloons TD 6

Similarity 41% The Bloons are back and better than ever! Get ready for a massive 3D tower defense game designed to give you hours and hours of the best strategy gaming available. Bloons TD 6 is a tower defense, strategy and multiplayer game developed and published by Ninja Kiwi. Released on December 17th 2018 has received 353,960 reviews of which 344,269 were positive and 9,691 were negative resulting in an impressive rating of 9.6 out of 10. While seeing 9,200 players online at once in the last 24 hours, this game is currently ranked #3 among games like Grey Goo based on player count.
9.6
344,269
9,691

9,200
players

4. Age of Empires IV: Anniversary Edition

Similarity 65% Celebrating its first year of delighting millions of global players, the award-winning and best-selling strategy franchise continues with Age of Empires IV: Anniversary Edition, putting you at the center of even more epic historical battles that shaped the world. Age of Empires IV: Anniversary Edition is a strategy, rts and base-building game developed by Relic Entertainment, Forgotten Empires, Climax Studios and World's Edge and published by Xbox Game Studios. Released on October 28th 2021 has received 80,870 reviews of which 69,559 were positive and 11,311 were negative resulting in a rating of 8.5 out of 10. With 6,242 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played games like Grey Goo.
8.5
69,559
11,311

6,242
players

5. Age of Empires III: Definitive Edition

Similarity 64% Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product. Age of Empires III: Definitive Edition is a strategy, base-building and rts game developed by World's Edge, Tantalus Media and Forgotten Empires and published by Xbox Game Studios. Released on October 15th 2020 has received 48,342 reviews of which 40,941 were positive and 7,401 were negative resulting in a rating of 8.3 out of 10. With 3,597 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played games like Grey Goo.
8.3
40,941
7,401

3,597
players

6. Anno 1800

Similarity 40% Anno 1800™ – Lead the Industrial Revolution! Welcome to the dawn of the Industrial Age. The path you choose will define your world. Are you an innovator or an exploiter? A conqueror or a liberator? How the world remembers your name is up to you. Anno 1800 is a city builder, strategy and simulation game developed by Ubisoft Mainz and published by Ubisoft. Released on April 16th 2019 has received 25,091 reviews of which 20,368 were positive and 4,723 were negative resulting in a rating of 8.0 out of 10. With 3,157 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played games like Grey Goo.
8.0
20,368
4,723

3,157
players

7. STAR WARS™ Empire at War - Gold Pack

Similarity 72% Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld? STAR WARS™ Empire at War - Gold Pack is a strategy, rts and space game developed by Petroglyph and published by LucasArts, Lucasfilm and Disney. Released on May 25th 2010 has received 39,435 reviews of which 38,503 were positive and 932 were negative resulting in an impressive rating of 9.6 out of 10. With 2,985 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played games like Grey Goo.
9.6
38,503
932

2,985
players

8. Age of Empires II (Retired)

Similarity 59% Age of Empires II has been re-imagined in high definition. With the release of Age of Empires II: Definitive Edition, this product will not be updated further. Age of Empires II (Retired) is a strategy, rts and medieval game developed by SkyBox Labs, Hidden Path Entertainment, Ensemble Studios and Forgotten Empires and published by Xbox Game Studios. Released on April 09th 2013 has received 101,351 reviews of which 97,083 were positive and 4,268 were negative resulting in an impressive rating of 9.4 out of 10. With 2,630 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played games like Grey Goo.
9.4
97,083
4,268

2,630
players

9. Age of Mythology: Retold

Similarity 44% From the creators of the award-winning Age of Empires franchise, Age of Mythology: Retold goes beyond history to a mythical age where gods, monsters, and humans collide. Age of Mythology: Retold is a strategy, 3d and rts game developed by World's Edge, Forgotten Empires, Tantalus Media, CaptureAge and Virtuos Games and published by Xbox Game Studios. Released on September 04th 2024 has received 16,708 reviews of which 15,043 were positive and 1,665 were negative resulting in a rating of 8.8 out of 10. With 2,425 concurrent players in the last 24 hours, the game currently holds the #9 spot among the most played games like Grey Goo.
8.8
15,043
1,665

2,425
players

10. Total War: SHOGUN 2

Similarity 46% Total War: SHOGUN 2 is the perfect mix of real-time and turn-based strategy gaming for newcomers and veterans alike. Total War: SHOGUN 2 is a strategy, historical and turn-based strategy game developed by Creative Assembly and Feral Interactive (Linux) and published by Feral interactive (Mac), Feral Interactive (Linux) and SEGA. Released on March 14th 2011 has received 24,952 reviews of which 22,620 were positive and 2,332 were negative resulting in a rating of 8.9 out of 10. With 2,117 concurrent players in the last 24 hours, the game currently holds the #10 spot among the most played games like Grey Goo.
8.9
22,620
2,332

2,117
players

Best deals on games like Grey Goo on Steam

Discover fantastic savings with the best discounts on a variety of games like Grey Goo available on Steam right now, updated on June 16th 2025. Looking for even more deals? Use the search filters to explore a wider range of discounted games like Grey Goo.

1. Starship Troopers: Terran Command

Similarity 56% Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes! Starship Troopers: Terran Command is a strategy, rts and singleplayer game developed by The Artistocrats and published by Slitherine Ltd.. Released on June 16th 2022 has received 10,784 reviews of which 9,461 were positive and 1,323 were negative resulting in a rating of 8.5 out of 10. Featuring a massive 99% discount, this game currently holds the #1 spot in the best deals for games like Grey Goo.
8.5
9,461
1,323

-99% 28.99€ 0.46€

2. Battlestar Galactica Deadlock

Similarity 50% In Battlestar Galactica Deadlock™ you’ll take command of the Colonial Fleet in defense of the Twelve Colonies during the First Cylon War. Lead many different types of ships in this 3D tactical game. Every decision counts, your strategy will be vital – can you ensure mankind’s survival? Battlestar Galactica Deadlock is a strategy, space and sci-fi game developed by Black Lab Games and published by Slitherine Ltd.. Released on August 31st 2017 has received 3,460 reviews of which 2,906 were positive and 554 were negative resulting in a rating of 8.1 out of 10. Thanks to its incredible 99% discount, this game is now the #2 best deal in games like Grey Goo.
8.1
2,906
554

-99% 38.99€ 0.48€

3. Interstellar Space: Genesis

Similarity 41% Interstellar Space: Genesis is a turn-based space 4X strategy game in which you attempt to build a thriving galactic empire. Discover mysteries among the stars, colonize worlds, and engage enemies in tactical turn-based combat on your journey to becoming the ruler of the galaxy! Interstellar Space: Genesis is a strategy, indie and 4x game developed and published by Praxis Games. Released on July 25th 2019 has received 772 reviews of which 648 were positive and 124 were negative resulting in a rating of 7.9 out of 10. Thanks to its incredible 99% discount, this game is now the #3 best deal in games like Grey Goo.
7.9
648
124

-99% 27.99€ 0.45€

4. Homeworld: Deserts of Kharak

Similarity 82% A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive. Homeworld: Deserts of Kharak is a strategy, rts and sci-fi game developed by Blackbird Interactive and published by Gearbox Publishing. Released on January 20th 2016 has received 8,519 reviews of which 6,789 were positive and 1,730 were negative resulting in a rating of 7.8 out of 10. Currently offered at a significant 99% discount, this title has earned the #4 position in the best deals for games like Grey Goo.
7.8
6,789
1,730

-99% 45.99€ 0.88€

5. Ashes of the Singularity: Escalation

Similarity 45% A massive-scale real-time strategy game where you command entire armies on a dynamic battlefield. Conquer multiple worlds across several single-player campaigns; or play with your friends in multiplayer combat. Ashes of the Singularity: Escalation is a rts, base-building and pvp game developed by Stardock Entertainment and Oxide Games and published by Stardock Entertainment. Released on November 10th 2016 has received 4,772 reviews of which 3,548 were positive and 1,224 were negative resulting in a rating of 7.2 out of 10. Currently offered at a significant 99% discount, this title has earned the #5 position in the best deals for games like Grey Goo.
7.2
3,548
1,224

-99% 28.99€ 0.56€

6. Aven Colony

Similarity 43% Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world. Aven Colony is a colony sim, city builder and strategy game developed by Mothership Entertainment LLC and published by Team17 Digital Ltd. Released on July 25th 2017 has received 2,638 reviews of which 1,921 were positive and 717 were negative resulting in a rating of 7.1 out of 10. Currently offered at a significant 99% discount, this title has earned the #6 position in the best deals for games like Grey Goo.
7.1
1,921
717

-99% 29.99€ 0.47€

7. XCOM: Enemy Unknown

Similarity 49% The XCOM: Enemy Unknown - Slingshot Pack is Now Available! XCOM: Enemy Unknown is a turn-based strategy, tactical and strategy game developed by Firaxis Games and Feral Interactive (Linux) and published by Feral Interactive (Linux) and 2K. Released on October 11th 2012 has received 56,414 reviews of which 52,717 were positive and 3,697 were negative resulting in an impressive rating of 9.2 out of 10. Currently offered at a significant 98% discount, this title has earned the #7 position in the best deals for games like Grey Goo.
9.2
52,717
3,697

-98% 19.99€ 0.47€

8. BattleGroupVR

Similarity 50% BattleGroupVR is a first person real-time space strategy where you lead a fleet of powerful warships into battle from the bridge of your own flagship. Assemble your fleet, upgrade your load-outs, train your captains, engage the enemy and secure the sector. Try not to go down with the ship. BattleGroupVR is a space sim, space and vr game developed and published by SpaceOwl Games. Released on July 31st 2023 has received 902 reviews of which 834 were positive and 68 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #8 position in the best deals for games like Grey Goo.
8.7
834
68

-98% 20.99€ 0.42€

9. Battlezone 98 Redux

Similarity 44% One of the greatest sci-fi strategy games of all time returns with remastered visuals, online multiplayer and near unlimited mod content from Steam Workshop. Experience thrilling first person action and acclaimed RTS in this explosive alternate vision of the 1960s space race. Battlezone 98 Redux is a strategy, action and first-person game developed by Big Boat Interactive and published by Rebellion. Released on April 18th 2016 has received 1,064 reviews of which 975 were positive and 89 were negative resulting in a rating of 8.7 out of 10. Currently offered at a significant 98% discount, this title has earned the #9 position in the best deals for games like Grey Goo.
8.7
975
89

-98% 19.99€ 0.58€

10. DG2: Defense Grid 2

Similarity 51% Setting the bar as the definitive tower defense game, Defense Grid 2 introduces new worlds and threats to test your tower placement strategies. With a bold new look and the addition of new game modes, player-versus-player and multiplayer co-op, every play brings fun new opportunities and challenges. DG2: Defense Grid 2 is a strategy, tower defense and indie game developed by Hidden Path Entertainment and published by Hidden Path Entertainment and 505 Games. Released on September 23rd 2014 has received 3,163 reviews of which 2,723 were positive and 440 were negative resulting in a rating of 8.3 out of 10. Currently offered at a significant 98% discount, this title has earned the #10 position in the best deals for games like Grey Goo.
8.3
2,723
440

-98% 12.49€ 0.26€

Free games like Grey Goo on Steam

Check out this fantastic list of free-to-play games like Grey Goo you can enjoy on Steam right now, updated on June 16th 2025. Looking for even more free titles? Use the search filters to explore a wider range of free to play games like Grey Goo.

1. Age of Empires III: Definitive Edition

Similarity 64% Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product. Age of Empires III: Definitive Edition is a strategy, base-building and rts game developed by World's Edge, Tantalus Media and Forgotten Empires and published by Xbox Game Studios. Released on October 15th 2020 has received 48,342 reviews of which 40,941 were positive and 7,401 were negative resulting in a rating of 8.3 out of 10. With 3,597 active players enjoying it for free, this strategy game has reached the #1 spot among the top free games like Grey Goo.
8.3
40,941
7,401

3,597
players

2. War Selection

Similarity 58% War Selection is a compelling RTS game featuring base building, resource extraction and warfare. Evolve from a stone age tribe to a distinct industrial nation with unique game mechanics and battle for supremacy with dozens of players on a unique procedurally generated map. War Selection is a strategy, base-building and free to play game developed and published by Glyph Worlds. Released on October 08th 2019 has received 21,854 reviews of which 18,745 were positive and 3,109 were negative resulting in a rating of 8.4 out of 10. Thanks to its free to play tag and a daily player base of 486, this game has secured the #2 spot in the ranking of free games like Grey Goo.
8.4
18,745
3,109

486
players

3. MechWarrior Online™ Legends

Similarity 42% MechWarrior Online™ Legends is a tactical, 'Mech-based online shooter set in the vast BattleTech Universe. Assume the role of an elite MechWarrior, piloting powerful BattleMechs, fighting for supremacy over the Inner Sphere. MechWarrior Online™ Legends is a free to play, mechs and multiplayer game developed and published by Piranha Games Inc.. Released on December 10th 2015 has received 12,220 reviews of which 9,790 were positive and 2,430 were negative resulting in a rating of 7.8 out of 10. Thanks to its free to play tag and a daily player base of 450, this game has secured the #3 spot in the ranking of free games like Grey Goo.
7.8
9,790
2,430

450
players

4. Battle Nations

Similarity 45% Battle Nations is back! Build your empire and lead your armies to victory! Choose from traditional troops and vehicles or unleash exotic forces like mammoths, velociraptors, sandworms, and futuristic plasma units! Battle Nations is a free to play, strategy and turn-based strategy game developed and published by Madrona Games Inc. Released on September 18th 2014 has received 1,407 reviews of which 963 were positive and 444 were negative resulting in a rating of 6.6 out of 10. Attracting a solid base of 248 players due to its free access, this strategy game has achieved the #4 position in the best free games like Grey Goo.
6.6
963
444

248
players

5. EMERGENCY

Similarity 53% Save lives – be a hero! Join forces against the chaos in the newest title of the award-winning EMERGENCY series. Take up your shift as incident commander and coordinate with other players to fight fires, arrest gangsters and rescue injured civilians. Your city needs you! EMERGENCY is a free to play, multiplayer and strategy game developed and published by Sixteen Tons Entertainment. Released on August 15th 2023 has received 5,564 reviews of which 3,797 were positive and 1,767 were negative resulting in a rating of 6.7 out of 10. Attracting a solid base of 197 players due to its free access, this strategy game has achieved the #5 position in the best free games like Grey Goo.
6.7
3,797
1,767

197
players

6. Star Trek Timelines

Similarity 41% Explore the Final Frontier in the ultimate sci-fi strategy RPG, Star Trek Timelines! Join Starfleet and overcome challenges as you boldly go where no game has gone before – across the entire history of Star Trek. Star Trek Timelines is a free to play, strategy and space game developed and published by Tilting Point. Released on July 12th 2017 has received 1,430 reviews of which 938 were positive and 492 were negative resulting in a rating of 6.4 out of 10. Attracting a solid base of 148 players due to its free access, this strategy game has achieved the #6 position in the best free games like Grey Goo.
6.4
938
492

148
players

7. Pixel Starships

Similarity 51% Pixel Starships is an FTL-style online sci-fi strategy builder and management game with a competitive PVP tournament. Set in the retro galaxy, your role is to explore space, meet aliens, and develop your ship, crew and AI. The game contains deep strategic and 4x elements. PSS is community-driven. Pixel Starships is a sci-fi, space and strategy game developed and published by SavySoda. Released on May 23rd 2023 has received 2,732 reviews of which 2,008 were positive and 724 were negative resulting in a rating of 7.1 out of 10. Attracting a solid base of 117 players due to its free access, this strategy game has achieved the #7 position in the best free games like Grey Goo.
7.1
2,008
724

117
players

8. Hades' Star

Similarity 56% A unique space strategy game where thousands of players participate in one shared galaxy. Hades' Star is a free to play, space and strategy game developed and published by Parallel Space Inc. Released on February 27th 2019 has received 2,577 reviews of which 1,874 were positive and 703 were negative resulting in a rating of 7.1 out of 10. Attracting a solid base of 104 players due to its free access, this strategy game has achieved the #8 position in the best free games like Grey Goo.
7.1
1,874
703

104
players

9. Zero-K

Similarity 53% With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps. Zero-K is a strategy, free to play and rts game developed and published by Zero-K Team. Released on April 27th 2018 has received 3,922 reviews of which 3,678 were positive and 244 were negative resulting in an impressive rating of 9.0 out of 10. The game currently holds the #9 spot among the most played free games like Grey Goo.
9.0
3,678
244

93
players

10. My Lands: Black Gem Hunting

Similarity 50% My Lands is a free online RTS where dark and light forces fight for Black Gem and dominion in a vast fantasy world. Cooperation between players, joint economy development, creation of clans and alliances and elaboration of a team strategy serve as the very foundation of the game. My Lands: Black Gem Hunting is a strategy, free to play and rts game developed by Gravvit Ltd and Forbes Consult Ltd and published by ELYLAND INVESTMENT COMPANY Ltd. Released on September 16th 2014 has received 3,306 reviews of which 2,766 were positive and 540 were negative resulting in a rating of 8.1 out of 10. The game currently holds the #10 spot among the most played free games like Grey Goo.
8.1
2,766
540

51
players